Coating container



Jan. 9, 1940. .P. KAISER I comma CONTAINER 2 Sheets-Sheet; 2

Filed March 14, 1938 Patented Jan. 9, 1940 UNITED STATES PATENT OFFICE.

' unt-722235;.

' 1 Claim. ((191- 10) This invention relates to preparing and effecting coating and re-coating of receptacles and containers, especially to be resistant to attack.

This invention has utility when incorporated in clearing and cleaning of surfaces andthe atmosphere thereabout, 'with coating at a controlled atmospheric condition for coating adherence and coating uniformity even as against pitting or presweating. I j Referring to the drawings:

Fig. 1 is a fragmentary view of an embodimen of the invention in which apparatus therefor is in working or. operative position; Fig. 2 is a view from the left of the truck in Fig. 1;

- Fig. 3'is. a view of equipment in container working condition, wherein the equipment showing as to the truck portion is on the line III-III, Fig. 1: Fig.4 is a fragmentary view of the truck with so aportion-of the equipment collapsed therewith;

. Fig. 5 is a fragmentary view of a container wall undergoing cleaning. a Container wall I (Fig. 5). sayof rigid mate- I rial whether masonry, wood, plastic, or metal, before use or after-use, may have its interior face carry foreign matter 2 asa roughness or irregularity. This condition in the handling of certain I liquids as in the instance of brewing, malting, canning, foodstuffs, or other substances-tends to react with a primary coating over the wall; and it is in order, eifectively torcarry out. the ends herein, to have such removed-as by power driven wire brush 3 to provide clearji'nner surface 4. a with a cleaned inner ,5, container 8 I (Fig. '3) is shown provided with manhole I, having atmosphere therein exposed to. draft blast 8 for carrying from such containergany particles removed from the inner surface 5 by cleaning and to eifect an atmosphericconditionand temperature therein suitable for applying coating. With this blast 8 efle'cting a continuity of change of atmosphere and removal of particles in suspension. the container is forthwith in condition for coating attention'to the-extent of initialcoating,

re-coating, or patching. 1

In the instance of" container 9 (Fig. 1) with open top llland bottom. liythere is lining l2 for thesidewall and lining I! for such bottom con'- 50 tinuous. In carrying-out the invention, blast 14 may control any air volume and temperature so thats'pray gun I! may be eflective to apply coating it onthe linings I 2-, ll. in the desired degree. in practice, as herein disclosed, the temperature 66 of the blast' 'll, its effectiveness. and humidity;

I surface.

I dispersing throughout the container to avoid any porary covering or'jblanket, say of fabric l1 localizing region I against air inflow while still leaving passage for draft exit It. At once the coating is completed, say with varnish, phenol condensation product, or cellulose ,derivative'of 26 the coating class as Duco', the exit ,orlflce maybe closed by-the blanket ll onthe container 8- or by replacing manhole cover at entrance opening 1 in container 8, thereby to shield or shut off the coating from exposure. This course is adopted in so such sequence and position for draft continuity that theblast is delivered into-the container continuously up tothe eifective placing of the closure and the sealing thereof against seepage for "sweating or pittin to, occur. v These coatings may be eflected even in cellars of considerable humidity" as well as at times of low temperature in the surroundings for the container. This means that ei'iicient operation is elbow- 3|, supplemental duct sections 32, and supplem'ental elbow 33. These duct sections may be assembled in such number and relationship as may be suitable, for the working tojoccurand as may be convenient in positioning the narrow shiftable truck. To this shiftable truck extends ilexible steam hose I having attachable coull iii) pling 35. Flow of the steam is controlled by steam valve 36 for flow by duct 31 into steam radiator 38 having dirt trap 39 with removable cap 40 therefor. From this trap 39 extends duct 4| past steam condensation trap 42 for condensation to flow of! by duct 43 and flexible water waste line 44 having clamp connection 45 with the line 43.

Power for the, ,motor 23 is controlled by switch 46. Electric current supply lines to this switch are in flexible duct, 41 from plug fitting 48. In out of use position, the flexible line may be wrapped on pipe frame 48 carried by the truck and with the hose lines disconnected. As placed, it is in order to plug in for electric power, to connect the steam line for control at the valve 36 and the waste line H for flow-oil, say to a sewer. The valve 36 may be adjusted for the volume of tsnifiam and thereby effect the desired tempera- On operating the switch 48, the blower is effective to "draw in air through the radiator and housing 50 past damper 5| which may be adjusted by arm 52 into desired open position. This incoming air, as thus volume-controlled by the damper and controlled as to temperature by the steam in the adjustment of the valve 35, is conducted by way 01' the duct, adjusted for the height desired by the telescopic sections and for the directions and lengths by the elbow or albows. This blast from the duct is so effected that the region of working in the receptacle or container is assured of the control atmosphere and temperature by the blast. Supplementally, this is comfort condition for the workmen and has meant in practice that the refitting of a container of say several hundred barrels capacity may be efficiently and economically, as well as safely conducted in a brief interval of time. There is superior result from the eil'orts, which efforts may be continuously undertaken by the operator over a series of containers.

In adjusting this range for the ducts, should the position not be one wherein the ducts are to be sustained for height directly at the tank or container, saddle 53 may be adjusted to engage under the horizontal range or elbow, thereby controlling the height for the telescopic sections, which telescopic sections are normally selfsustaining due to the friction thereof. At this adjusted height for the saddle 53, its depending stem 54 in tubular portion 55 is locked by set screw'56.

In practice hereunder containers, tanks, or vats have been given attention in capacity from one hundred to say six or seven hundred barrels. In these operations, a desirable drying temperature may be in the neighborhood of 130 F., while the working temperature for the character of coating may be as much as to F. The volatiles and rate of drying are controlled in blast from say a cubic foot to five cubic feet per minute per barrel for the capacity of the container.

What is claimed and it is desired to secure by United States Letters Patent is:

The herein described process of providing effective surface protective coverage against attack from contents of a container in which a workman may cooperate in steps of the process to be undertaken before the container is charged, which includes establishing an incoming preheated hot air draft, at a volume per minute in excess of natural draft, of respirable air supply at normal atmospheric pressure, thoroughly to provide a working condition region and condition in the container, controlling temperature for congealing the coating'by adjusting the temperature of the draft, applying at the working region a coating containing volatile solvent by spraying through an atmosphere of 80 to 100 F. to deliver the coating on the surface of the container in said working region there to congeal as the coating is applied, removing volatiles from proximity to the coating as congealing by directing said draft at a temperature of approximately F. to pervade the interior of the container to an extent to carry away volatiles therefrom in promoting said cong'ealing of the coating while continuously maintaining the atmosphere in respirable condition, and shielding the congealing coating against'humidity precipitation thereon for the coating to set against pitting or sweating, said shielding being effected by shutting off entrance of air to the container and simultaneously discontinuing said draft.

PAUL KAISER. 

